Plasmonic bandgaps and Trapped Plasmons on Nanostructured Metal Surfaces

Details Plasmonic bandgaps and Trapped Plasmons on Nanostructured Metal Surfaces Plasmonic bandgaps and Trapped Plasmons on Nanostructured Metal Surfaces

2005-05-09

arxiv.org/abs/physics/0505061v2

Physics

Optics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.95.116802

Nanostructured metal surfaces comprised of periodically arranged spherical voids are grown by electrochemical deposition through a self-assembled template. Detailed measurements of the angle- and orientation-dependent reflectivity reveal the spectral dispersion, from which we identify the presence of both delocalized Bragg- and localized Mie-plasmons. These couple strongly producing bonding and anti-bonding mixed plasmons with anomalous dispersion properties. Appropriate plasmon engineering of the void morphology selects the plasmon spatial and spectral positions, allowing these plasmonic crystal films to be optimised for a wide range of sensing applications.

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